A student read a case in which a woman had died of haemophilia in the 1980s. The case is:
Correct answer: C. True: Females can have haemophilia if both the mother and father were affected
- A. False: Females can't have haemophilia
- B. False: Haemophilia wasn't diagnosed until then
- C. True: Females can have haemophilia if both the mother and father were affected
- D. True: Females can have haemophilia if any of the parent were affected
- E. None of the answers are correct
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About X-linked Recessive Inheritance
X-linked recessive inheritance involves genes on the X chromosome, so males express a recessive allele with no corresponding allele on their single X chromosome, while females may be carriers. Pedigrees cover haemophilia and red-green colour blindness, including carrier mothers, affected sons and the absence of father-to-son transmission.
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